57155798 has 16 divisors (see below), whose sum is σ = 98081280. Its totient is φ = 24470376.

The previous prime is 57155779. The next prime is 57155809. The reversal of 57155798 is 89755175.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20873 + ... + 23451.

It is an arithmetic number, because the mean of its divisors is an integer number (6130080).

Almost surely, 2^57155798 is an apocalyptic number.

57155798 is a deficient number, since it is larger than the sum of its proper divisors (40925482).

57155798 is a wasteful number, since it uses less digits than its factorization.

57155798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its digits is 441000, while the sum is 47.

The square root of 57155798 is about 7560.1453689727. The cubic root of 57155798 is about 385.2004308600.

The spelling of 57155798 in words is "fifty-seven million, one hundred fifty-five thousand, seven hundred ninety-eight".